This page explains how John P. P. Ochsner (USATT# 5004)'s rating went from 1721 to 1718 at the Mountlake TTC 98 Open held on - 18 Jul 1998. The links below take you to pages that describe various aspects of the rating processor.

The rating processor goes through 4 passes in order. The links take you to pages that provide detailed explanations of the calculations during each of the 4 passes.